Trap cage



C. MAGEE Oct. 12, 1937.

TRAP GAGE Filed June 26, 1936 ATTORN EYS Patented Oct. 12, 1937 UNITEDSTATES PATENT OFFICE TRAP CAGE Clyde Magee, Freer, Tex.

Application June 26, 1936, Serial No. 87,525

1 Claim. (Cl. 103-225) T s invention relates to attachments for oil wellpumps and has for the primary object the provision of a simple andinexpensive device of this character which will prevent sand and otherforeign matter taken up with the oil from gravitating back intoengagement with the cups of the pump plunger consequently obviatingundue wear on the cups and the sticking thereof and which may be easilyand quickly adapted to a pump plunger without alteration thereto.

With these and other objects in View, this invention consists in certainnovel features of construction, combination and arrangement of parts tobe hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had tothe following description and accompanying drawing, in which Figure 1 isa fragmentary vertical sectional View illustrating the application of myinvention to a pump plunger and showing the same operating in a pumbarrel.

Figure 2 is a sectional view taken on'the line 2-2 of Figure 1.

Figure 3 is a sectional view taken on the line 33 of Figure 1.

Referring in detail to the drawing, the numeral I indicates a pumpbarrel commonly used with oil pumps in which reciprocates a pump plunger2 including the usual cups 3. A pump plunger of the character shown whenreciprocating in the barrel-to raise oil from the well also lifts alarge amount of sand and other foreign matter which matter afterreaching a certain height in the well gravitates and frequently clogsthe cups and causes sticking thereof and undue wear on said cups. Toeliminate troubles of this kind,

my invention is adapted to the pump plunger and consists of a sleeve 4threaded on the pump plunger, as shown at 5, and snugly fits the barrell. A valve cage 6 is located in the sleeve and may be welded orotherwise secured thereto. The stem 1 of the cage 5 is connected to theusual operating rod 8 of the pump. A ball valve 9 operates in the cagein conjunction with a seat ll] held in the sleeve by a shoulder l l andthe end of the plung- During the reciprocation of the plunger 10 2 inthe barrel oil as well as foreign matter is forced upwardly past thevalve 9 and the foreign matter after reaching a certain height or afterthe stopping of the pump gravitates and the sleeve having tight fit withthe pump barrel prevents the foreign matter from contacting the cups 3but will permit such foreign matter to pass therein so that on startingagain of the pump such foreign matter may pass through the plungerduring the unseating of the valve 9. It is to be understood that the oiland foreign matter passing upwardly in the barrel pass through thesleeve 4.

The upper edge of the sleeve is tapered, as shown at l2. 7

Having described the invention, I claim:

In combination with an oil well pump having a barrel and a plungertherein, a sleeve having a slidable snug fit with the barrel anddetachably secured to the plunger at one end and having the other endthereof tapered internally, a shoulder formed in said sleeve, a valveseat held in the sleeve by the shoulder and the plunger, a Valve cagesecured to the sleeve and to an operating stem, and a ball valveoperating in the cage in conjunction with the seat.

- CLYDE MAGEE.

